diff options
| author |   Stanislaw Gruszka <sgruszka@redhat.com> | 2012-03-13 16:11:27 +0100 |
|---|---|---|
| committer |   John W. Linville <linville@tuxdriver.com> | 2012-03-26 15:07:22 -0400 |
| commit | 883a649b737cdbe3ede7e50f3f939fd706ed5c4e (patch) | |
| tree | 6091c7138144cd252c830c7dd357438c98c4e31c /drivers/net/wireless/iwlegacy/common.c | |
| parent | usbnet: consider device busy at each recieved packet (diff) | |
| download | linux-dev-883a649b737cdbe3ede7e50f3f939fd706ed5c4e.tar.xz linux-dev-883a649b737cdbe3ede7e50f3f939fd706ed5c4e.zip | |
iwlegacy: do not nulify il->vif on reset
This il->vif is dereferenced in different part of iwlegacy code, so do
not nullify it. This should fix random crashes observed in companion
with microcode errors i.e. crash in il3945_config_ap().
Additionally this should address also
WARNING: at drivers/net/wireless/iwlegacy/common.c:4656 il_mac_remove_interface
at least one of the possible reasons of that warning.
Cc: stable@vger.kernel.org
Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/wireless/iwlegacy/common.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/net/wireless/iwlegacy/common.c b/drivers/net/wireless/iwlegacy/common.c index e5ac04739bcc..6a692a534ffc 100644 --- a/drivers/net/wireless/iwlegacy/common.c +++ b/drivers/net/wireless/iwlegacy/common.c @@ -4508,6 +4508,7 @@ il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) { struct il_priv *il = hw->priv; int err; + bool reset; mutex_lock(&il->mutex); D_MAC80211("enter: type %d, addr %pM\n", vif->type, vif->addr); @@ -4518,7 +4519,12 @@ il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) goto out; } - if (il->vif) { + /* + * We do not support multiple virtual interfaces, but on hardware reset + * we have to add the same interface again. + */ + reset = (il->vif == vif); + if (il->vif && !reset) { err = -EOPNOTSUPP; goto out; } @@ -4528,8 +4534,11 @@ il_mac_add_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif) err = il_set_mode(il); if (err) { - il->vif = NULL; - il->iw_mode = NL80211_IFTYPE_STATION; + IL_WARN("Fail to set mode %d\n", vif->type); + if (!reset) { + il->vif = NULL; + il->iw_mode = NL80211_IFTYPE_STATION; + } } out: |